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Updated: Aug 22, 2026

Rapid Point-of-Care Assay of Enoxaparin Anticoagulant Efficacy in Whole Blood
11:17

Rapid Point-of-Care Assay of Enoxaparin Anticoagulant Efficacy in Whole Blood

Published on: October 12, 2012

Unfractionated heparin in cardiology: redefining the standard of practice

Thomas L Rihn1, José Díez,

  • 1School of Pharmacy, Duquesne University, Pittsburgh, USA. trihn@UPA-LLC.com

Pharmacotherapy
|September 1, 2004
PubMed

Insights

Unfractionated heparin (UFH) is less effective and poses greater risks than newer antithrombin agents for acute coronary syndromes (ACS). Guidelines now recommend agents like enoxaparin for better outcomes in UA-NSTEMI and STEMI management.

Area of Science:

  • Cardiology
  • Pharmacology
  • Thrombosis Research

Background:

  • Acute coronary syndromes (ACS), including unstable angina (UA), NSTEMI, and STEMI, require prompt antithrombin therapy.
  • Unfractionated heparin (UFH) has been a historical standard but presents challenges like paradoxical platelet aggregation and difficult monitoring.
  • UFH's limitations include complex dosing, reagent variability affecting aPTT, and increased ischemic risk upon discontinuation.

Purpose of the Study:

  • To evaluate the efficacy and safety of alternative antithrombin agents compared to UFH in ACS management.
  • To highlight the limitations of UFH in current cardiology practice.
  • To support the transition towards newer, more effective anticoagulants.

Main Methods:

  • Review of key clinical trials in UA-NSTEMI and STEMI patients.
  • Analysis of guideline recommendations from the American College of Cardiology and American Heart Association.
  • Comparison of UFH with low-molecular-weight heparins (LMWHs) like enoxaparin and direct antithrombins like bivalirudin.

Main Results:

  • UFH demonstrated inferiority to LMWHs in major UA-NSTEMI trials.
  • Enoxaparin showed superiority over UFH in combination with tenecteplase for STEMI reperfusion.
  • Newer agents like enoxaparin and bivalirudin exhibit favorable safety and efficacy profiles in percutaneous procedures.

Conclusions:

  • UFH is largely being superseded by superior antithrombin agents in cardiology.
  • Enoxaparin is recommended as the preferred agent for UA-NSTEMI.
  • Optimized anticoagulation strategies increasingly favor newer agents over UFH due to improved efficacy and safety profiles.

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